It's no secret that Darcy Kuemper has struggled in the past few starts (or year+ that he's started for the Wild). It's no secret Devan Dubnyk has played immensely well for the Wild in that same time frame, but it's also no secret that having one reliable goaltender a recipe for failure in the NHL.
The Wild simply need better out of Darcy if they are going to succeed with him in net. Darcy is 1-0-3 in his starts this season, including having been pulled for bad performance. That simply cannot continue, particularly not if Darcy wants a decent contract at the end of this season (when he is an RFA).